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EP3620264B1 - Machine à presser dotée d'un entrainement commandé en fonction des données de pressage enregistrées - Google Patents

Machine à presser dotée d'un entrainement commandé en fonction des données de pressage enregistrées Download PDF

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Publication number
EP3620264B1
EP3620264B1 EP18192953.0A EP18192953A EP3620264B1 EP 3620264 B1 EP3620264 B1 EP 3620264B1 EP 18192953 A EP18192953 A EP 18192953A EP 3620264 B1 EP3620264 B1 EP 3620264B1
Authority
EP
European Patent Office
Prior art keywords
press
pressing
data set
drive
workpiece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18192953.0A
Other languages
German (de)
English (en)
Other versions
EP3620264A1 (fr
Inventor
Matthias Ruch
Rudolf Kreuzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Emerson Professional Tools AG
Original Assignee
Emerson Professional Tools AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Emerson Professional Tools AG filed Critical Emerson Professional Tools AG
Priority to EP18192953.0A priority Critical patent/EP3620264B1/fr
Priority to US16/561,718 priority patent/US11980928B2/en
Priority to CN201910841830.XA priority patent/CN110877080B/zh
Publication of EP3620264A1 publication Critical patent/EP3620264A1/fr
Application granted granted Critical
Publication of EP3620264B1 publication Critical patent/EP3620264B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/046—Connecting tubes to tube-like fittings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/048—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using presses for radially crimping tubular elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • B29C66/92451—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power using joining tools having different pressure zones or using several joining tools with different pressures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/26—Programme control arrangements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24—Querying
    • G06F16/248—Presentation of query results

Definitions

  • the present invention relates to a pressing machine for plastically deforming a tubular workpiece, in particular a fitting.
  • the invention further relates to a method for operating such a pressing machine, pressing jaws for coupling to a pressing machine, and a tubular workpiece, in particular a fitting.
  • a fitting can, for example, be designed as a pipeline fitting, which can be used as a connecting piece of a pipeline.
  • a fitting can consist of various materials, for example copper, aluminum, plastic, composite and/or (stainless) steel.
  • a (pipe) pressing machine can comprise pressing jaws made of metals such as steel, aluminum or similar, which can be exchangeable. Furthermore, the pressing machine can comprise an exchangeable pressing tongs which has the pressing jaws. Other pressing jaw arrangements comprising pressing jaws are also known. By means of the pressing jaws or the pressing jaw arrangement, a force can be exerted on the fitting in order to deform it plastically in such a way that the fitting can be as fits snugly, tightly and firmly against a pipe. When using such a press machine, the press jaws can be pressed together in order to press a fitting arranged between them over a pipe. The press machine can be hand-held and operated by a drive. Typically, electric and/or hydraulic drives are used.
  • the pressing jaws or the pressing jaw arrangement are workpiece-specific.
  • different pressing jaws/pressing jaw arrangements are used to press metal fittings, such as copper or (stainless) steel fittings, than when pressing plastic fittings.
  • the pressing machine can be adapted to different workpieces, especially fittings, by exchanging the pressing jaws/pressing jaw arrangement.
  • pressing is usually always carried out using the maximum pressing force, regardless of the pressing jaws or the pressing jaw arrangement and/or the fittings actually used.
  • this can be disadvantageous because, for example, plastic fittings can be pressed with a much lower pressing force than metal fittings. Applying the maximum pressing force therefore leads to unnecessary energy waste and possibly to damage to the fitting and the pipes to be connected.
  • each type of press jaw or press jaw arrangement used has its own characteristic pressing characteristics.
  • the pressing characteristics can depend, for example, on the transmission ratio of the press jaw arrangement, the material of the press jaws and the workpiece to be pressed.
  • a workpiece such as a steel fitting should be pressed differently than a plastic fitting, in order to guarantee the best possible form fit and a long service life of the pressed fitting.
  • the pressing processes are different for fittings with different dimensions because, for example, the press jaws only engage in the fitting later during the pressing process with a fitting with a smaller diameter.
  • the publication DE 10 2013 203 553 B3 discloses a hand-held pressing device in which the pressing force and/or its progression during the pressing process is recorded in order to check the pressing process.
  • the determined pressing force is measured with a specified curve. If the determined data does not fall within a range around the specified curve, an error is generated, which is preferably displayed to the user by an external display device.
  • the publication DE 10 2008 024 018 A1 discloses a method for operating a motor-operated hand pressing device. After the specified pressing force has been reached or a specified time has elapsed, the press piston in this hand pressing device only returns to an intermediate position and not to its starting position. The intermediate position is determined by means of a distance value or time measurement stored in the device.
  • the publication WO 2016/198973 A1 discloses a portable compression or cutting system for mobile use and a method for its operation.
  • the present invention is therefore based on the object of achieving the best possible pressing of a fitting with a pipe while protecting the material.
  • an improved (pipe) pressing machine is to be provided which enables such pressing.
  • the present invention relates to a pressing machine for plastically deforming a tubular workpiece, in particular a fitting, the pressing machine comprising: pressing jaws, a drive, set up to drive the pressing jaws in order to apply a force to the workpiece, a sensor system, which is set up to record a pressing data set during a pressing process and a control, which is set up to control the drive based on the recorded pressing data set.
  • the tubular workpiece can be, for example, a fitting, which is pressed together to connect two pipes.
  • the fitting can, for example, consist at least partially of copper, aluminum, plastic, composite and/or (stainless) steel.
  • the pressing machine in turn, can be set up to plastically deform such a tubular workpiece, such as a fitting, in such a way that to deform it so that it is connected to a piece of pipe arranged in the fitting.
  • pressing can be carried out using the pressing machine in order to connect a fitting to a pipe in a form-fitting and/or force-fitting manner in a permanent manner.
  • the fitting can be specified, for example, in accordance with the DIN EN 1254-7 standard.
  • the pressing jaws can be movable relative to one another and, for example, can be closed and also moved apart so that, for example, a tubular workpiece can be arranged between the pressing jaws when moved apart.
  • the pressing jaws can be interchangeable and have jaws for pressing, crimping or cutting.
  • the pressing machine can have two pressing jaws.
  • the drive can comprise an electric motor, a pneumatic and/or a hydraulic drive unit and a gear.
  • the pressing jaws of the pressing jaw arrangement can be moved relative to one another and, for example, driven into the closed state.
  • the drive can at least partially apply the force that is necessary to deform the tubular workpiece, for example to connect a fitting to a piece of pipe.
  • the drive can be connected to the press jaws directly or via a gear to transfer the drive force to the press packs.
  • the force acting on the press jaws can be variably adjusted, for example by varying motor parameters or other parameters (such as gear settings).
  • the press data set includes at least two press data values, whereby press data can be, for example, a press pressure or a press force that is exerted by the press jaws on the fitting.
  • the press pressure can also be determined indirectly via sensors via the current consumption or power consumption of the motor.
  • the press data can vary with the passage of time during the pressing process.
  • the press data can also vary with respect to a stroke of a working piston.
  • the stroke of the working piston can be derived, for example, from the engine speed.
  • the engine speed over time results in the strokes of the pump piston, from which the amount of oil pumped can be determined and from this the filling of the working cylinder can be calculated.
  • the path of the working piston can then be determined.
  • the press data set can be recorded from an initial state, for example when the press jaws are maximally open, to a final state in which the press jaws are completely closed and the workpiece is thus completely plastically deformed.
  • the press data set can also be recorded starting from a later point in time during the pressing process and/or the recording can be ended at an earlier point in time before the end of the pressing process.
  • the prerequisite is that the recorded press data set is suitable for characterizing the pressing process and thus enables a correspondingly adapted control of the drive.
  • the sensor system can comprise corresponding detection means for this purpose, for example one or more sensors which determine the previously mentioned press data.
  • the sensor system can also comprise corresponding evaluation means which can be designed, for example, by means of a processor and/or a memory with corresponding program code.
  • the detection means can be provided separately from the evaluation means on the pressing machine.
  • the sensor system can be supplied via an energy source arranged on the pressing machine, which can also supply the drive.
  • the sensor system can be set up to transmit or provide the press data set to the control system so that the drive can be controlled accordingly.
  • the sensor system can be activated or deactivated by a user, for example, using a switch to activate or deactivate control of the drive based on the recorded press data set.
  • the recorded press data can depend on the press jaws used or the workpiece, such as the fitting, so that different press data is obtained during the pressing process depending on the geometric arrangement or material.
  • the control of the drive can thus be optimally adapted to a specific workpiece and/or specific press jaws.
  • the press machine can thus apply an individual pressing force using the drive in order to achieve optimal and material-friendly deformation of the workpiece.
  • the use of the sensor system allows the press jaws and/or the workpiece to be identified automatically, which, for example, enables the control of the drive to be automatically adjusted during operation so that the operator of the press machine does not have to make any manual inputs and is therefore not subjected to any additional strain. This can reduce the risk of incorrect loading.
  • the present invention can be used, for example, in the electrical field for Pressing, cutting and hole punching can be used.
  • control of the drive according to the invention can include switching off the drive, which saves energy and avoids unnecessary application of force from the press jaws to the workpiece. This can protect both the pressed workpiece and the press machine according to the invention.
  • the pressing machine comprises a storage medium with a database which comprises at least one stored pressing data set for a pressing process of at least one type of pressing jaws and/or at least one type of tubular workpieces.
  • the database can contain pressing data sets for one or more types of pressing jaws and/or workpieces.
  • the types of stored pressing jaws and workpieces are defined, for example, by their geometric design or their material.
  • the storage medium can also be connected to the pressing machine in a modular manner. Thus, depending on which tubular workpieces and/or pressing jaws are used, different storage media with one or more stored sets of pressing data for corresponding pressing processes can be provided.
  • the database can be accessed via a (wired or wireless) interface, for example to update the contents of the database.
  • the press machine comprises that the control is set up to compare the recorded press data set with the at least one stored press data set and to control the drive based on the recorded press data set if the at least one recorded press data set is assigned to at least one corresponding stored press data set.
  • the storage medium can contain corresponding control parameters for controlling the press machine, which are assigned to corresponding press data sets.
  • the press data contained in the database can be compared with the press data set recorded by the sensor system, so that the drive can be controlled accordingly if a press data set matches.
  • the drive can thus be controlled appropriately according to the press jaws used and recognized by the sensor system and/or the workpiece during the pressing process.
  • the parameters suitable for controlling the press machine which were determined based on the recorded press data set, can also be be made available to a user so that they can then be set manually by a user. If there is no match between the recorded press data set and a stored press data set, no assignment can be made between the recorded and the stored press data set.
  • the drive can then be controlled according to other preset parameters so that reliable pressing is guaranteed even if the press jaws and/or the workpiece are not recognized.
  • the pressing machine further preferably comprises that the database comprises at least one specific control parameter for controlling the drive, wherein the at least one specific control parameter is assigned to a corresponding stored pressing data set, wherein the at least one specific control parameter comprises pressing parameters, in particular a maximum pressing force, a pressing path and/or a pressing duration and/or wherein the at least one specific control parameter comprises drive parameters, in particular a drive speed, drive power and/or an oil pressure.
  • the control parameters from the database can be used accordingly to operate the drive. For example, control parameters for stainless steel fittings and different control parameters for copper fittings can be stored in the database.
  • the corresponding control parameters can be loaded from the database and used by the controller to control the drive and ultimately the pressing machine.
  • corresponding control parameters can be stored in the database for different characteristics of the pressing machine (e.g. transmission ratio, type of pressing jaws, size of the workpiece to be pressed, material of the workpiece to be pressed, and/or shape of the workpiece to be pressed) in order to enable optimal pressing or deformation of the respective workpiece.
  • certain pressing forces, pressing speeds, pressing paths and/or pressing times can be specified, for example, which are to be used by the pressing machine for pressing or deforming the fitting with a piece of pipe.
  • These parameters can be specified, for example, in the form of a pressing curve that shows a temporal progression of pressing force, pressing path and/or pressing speed. specifies.
  • the expert understands that, depending on the intended use of the press machine, appropriate control parameters must be stored in the database.
  • Various drive parameters can also be stored in the database, which can be loaded based on the identified press jaw arrangement in order to ultimately deform the (identified) workpiece.
  • the press parameters or drive parameters can include motor and/or gear parameters, which can regulate the power transmission from the drive to the press jaws.
  • the press machine further preferably comprises that the drive is controlled based on the at least one specific control parameter when the at least one recorded press data set is assigned to at least one corresponding stored press data set.
  • the press machine can thus be specifically controlled based on the determined press data, so that there is no need to resort to a general, non-specific control parameter, i.e. one that is independent of the workpiece and/or the press jaws used. This can prevent an unnecessarily high pressing force or pressing pressure from being applied to the workpiece or the pressing process from taking an unnecessarily long time.
  • the press machine further preferably comprises that the drive is set up to be controlled using non-specific control parameters if the at least one recorded press data set is not assigned to at least one corresponding stored press data set, wherein the at least one non-specific control parameter comprises press parameters, in particular a maximum press force, a press path and/or a press duration and/or wherein the at least one specific control parameter comprises drive parameters, in particular a drive speed, drive power and/or an oil pressure.
  • the non-specific control parameters can, for example, be defined in such a way that reliable pressing is ensured regardless of the press jaws used and/or the workpiece to be pressed.
  • the press machine can also be set up in such a way that it is controlled using non-specific control parameters if, for example, no parameters are available from the sensor system for controlling the control. It can also be provided that a user can select whether the press machine uses the specific control parameters based on the recorded press parameters. should be used or not.
  • the person skilled in the art understands that the above-mentioned information regarding the pressing parameters of the specific control parameters applies accordingly to the pressing parameters of the non-specific control parameters.
  • the pressing machine further preferably comprises the sensor system being set up for feature recognition of characteristic features of the pressing jaws and/or the workpiece, in particular for recognizing characteristic geometric and/or material-specific features based on the recorded pressing data set.
  • the sensor system can be used to recognize a shape and/or size of the workpiece or the pressing jaws used. Based on these characteristic features, the workpiece can be identified at least by its type and the motor can then be controlled accordingly in order to optimally deform the workpiece.
  • Certain geometric features of workpieces and pressing jaws can be linked to pressing data sets, so that certain characteristic features of pressing jaws and workpieces are assigned to certain pressing data sets.
  • the press machine also preferably comprises a log memory which is set up to store the sensor data and/or control data. This allows the deformation process to be made traceable. All or some of the data on the deformation process can be stored in the log memory in order to also enable quality monitoring of individual deformations.
  • the log memory can be accessed via a (wireless or wired) interface in order to read out the corresponding data.
  • the pressing machine comprises that the at least one recorded pressing data set represents a first pressing curve and wherein the at least one stored pressing data set represents a second pressing curve and wherein the courses of the first and second pressing curves are checked for agreement and the drive is controlled according to the stored pressing data set if the first and second pressing curves match and the first pressing curve matches the second pressing curve.
  • the pressing machine is thus set up to compare an actual pressing curve with a stored pressing curve. Based on the comparison, the workpiece used and/or the pressing jaws used can then be identified.
  • the pressing curve can result, for example, from the temporal progression of the pressure in the working cylinder during the pressing process or from the progression of the pressure in relation to a path covered by the working piston of the pressing machine.
  • a number of suitable methods for comparing the pressing curves are known to those skilled in the art, for example by comparing the recorded pressing data points at different path points of the working piston, by forming derivatives of the pressing curve and determining and comparing gradients of the pressing curve, for example using common software.
  • the pressing machine can also preferably be an electrically driven hydraulic or mechanical hand pressing device. With the help of a hand pressing device, pressing can be carried out flexibly at different locations, such as a construction site. Electrically driven pressing devices can apply high pressing forces that ensure reliable pressing. In a hydraulic hand pressing device, for example, a hydraulic pressure of up to approx. 550 bar can be applied, which acts directly on the workpiece enclosed by the pressing jaws.
  • the invention further comprises a method for operating the pressing machine according to the invention for plastically deforming a tubular workpiece, in particular a fitting, according to claim 9.
  • the method further preferably comprises determining a plastic deformation of the workpiece during the pressing process based on the recorded pressing data set, wherein the control comprises stopping the motor when it is determined that no more plastic deformation of the workpiece is taking place. This ensures that no unnecessary force is applied to the workpiece by the pressing jaws when no more plastic deformation is taking place. This reduces the pressing time, saves energy and can protect the workpiece to be pressed from damage caused by excessive pressing pressure.
  • the method further preferably comprises the drive defining a starting position and an end position, wherein the drive is driven in the opposite direction after the motor has stopped in order to return to the starting position.
  • the pressing machine is back in the starting position, which enables rapid pressing in the case of several pressing processes, for example for several workpieces, since the pressing machine is always in the starting state before the pressing process.
  • press jaws are described for coupling to the press machine according to the invention for plastically deforming a tubular workpiece, in particular a fitting, wherein the press jaws are suitable for providing a suitable press data set.
  • a tubular workpiece is described, in particular a fitting, for pressing by the press machine according to the invention, wherein the tubular workpiece is suitable for providing a suitable press data set.
  • the press jaws and/or the tubular workpiece can be suitable for generating suitable press data sets, so that comparable press data can be generated even when the same press jaws and/or workpieces are used repeatedly.
  • the press data sets generated by the press jaws and/or the workpiece according to the invention can have a predefined maximum error tolerance, so that with a correspondingly high Probability that the pressing data generated can be used to determine the pressing jaws used and/or the workpiece being pressed.
  • Fig. 1 shows an embodiment of a hydraulic hand press device or a press machine 10 with a hydraulic power transmission unit.
  • a motor 20 drives an eccentric 24 connected to it via a gear 22.
  • the motor 20 is preferably a brushless motor, which is supplied by a controller 40 with appropriately modulated current from a battery or a wired power supply (not shown).
  • the gear 22 reduces the speed of the motor 20 and increases the torque.
  • the eccentric 24 connected to the gear converts the rotary motion of the output shaft of the gear 22 into a one-dimensional oscillating motion in order to drive a piston pump 27 of the hydraulic system 26. Due to its movement, the piston pump 27 pumps a hydraulic fluid from a reservoir into a working cylinder 25, whereby the hydraulic pressure in the working cylinder 25 increases.
  • the increasing hydraulic pressure pushes a piston 28, which is movably guided in the cylinder, in the illustration of the Fig. 1 to the left, in the direction of the fastening area 30 for exchangeable pressing jaws (not shown in detail).
  • the piston 28 can transfer very high pressures to the press jaws.
  • the piston 28 is mechanically connected to rollers 29, which move with the movement of the piston 28.
  • the rollers 29 move in the usual way between inclined ends of press jaws, which are thus closed and can plastically deform the workpiece with high force.
  • the hydraulic pressure is transferred directly proportionally to the connected press jaws and generates a pressing force on the workpiece that is directly proportional to the hydraulic pressure.
  • the workpiece is pressed and plastically deformed by the hydraulic pressure increasing during pressing and the resulting increasing pressing force on the workpiece or fitting.
  • the pressing force on the tool can be determined by measuring the hydraulic pressure.
  • the hydraulic pressure in the hydraulic system 26 can be easily measured using a pressure sensor 42.
  • the pressure sensor 42 transmits the measured pressure signal to the controller 40 via signal lines or wirelessly using a corresponding radio transmission.
  • Wireless signal transmission means such as common digital wireless connections such as Bluetooth, NFC or the like, can be used.
  • Analog signals from the pressure sensor 42 can be converted into digital signals in an A/D converter so that they can be evaluated by the digital controller 40.
  • the controller 40 has at least one digital processing unit, such as a microcontroller, DSP, FPGA, ASIC or the like.
  • a database 44 is also provided in which predetermined values that are required for the evaluation and control can be called up, which is coupled to the controller 40.
  • the controller 40 outputs corresponding control signals to the motor 20 via power electronics (not shown).
  • the motor 20 is controlled using these control signals in order to operate it at a certain regulated speed and to stop it at the end of the pressing process.
  • the pressing machine can also be designed as a purely mechanical hand pressing device with a mechanical power transmission unit.
  • a motor generates a rotary movement, which is transmitted via a gear to at least one mechanical power transmission unit, for example a lever or a screw drive.
  • the mechanical power transmission unit converts the rotary movement into a linear movement, which, according to the hydraulic hand press device 10 described above, Fig. 1 , rollers are moved with high force, which move the pressing jaws. Due to the increasing force of the pressing jaws, a workpiece, for example a fitting, which is located between the pressing jaws is plastically deformed.
  • Force sensors for measuring the force transmitted from the motor to the tool can be arranged at various points in the mechanical hand-held pressing device in order to measure a force proportional to the pressing force and to signal it to the control system. Furthermore, the current consumed by the motor 20 is also proportional to the motor torque and thus to the pressing force on the pressing jaws.
  • Figures 2 and 3 show pressing curves K1 to K7 for different fittings of different materials and sizes.
  • the pressing curves describe the pressing pressure P applied to the fitting as a function of the stroke D of the working piston.
  • Figure 2 shows the pressing curves of a fitting with a diameter of 22 mm, where K1 represents the pressing curve for a fitting made of stainless steel (INOX) and where the curve K2 represents the pressing curve for a fitting made of copper.
  • K3 represents a pressing without a fitting. In this case, the pressing jaws are closed when the pressure increases. If the curve K1 or K2 has the same slope when the pressure increases as the curve K3, this indicates that the fitting is maximally deformed and the pressing jaws are closed.
  • FIG. 2 This point of complete deformation of the respective fittings is in Figure 2 as P max_DB1 or P max_DB2 .
  • the pressing curves K4 to K7 of the Figure 3 show the pressure curve during pressing for plastic fittings with 18 mm diameter. As in the Figures 2 and 3 As shown, the pressure increase for the smaller fitting with 18 mm diameter only begins at approximately 9 mm stroke, whereas the pressure increase for the larger fitting with 22 mm diameter occurs earlier, namely at approximately 6 mm stroke. For larger fittings, the jaws come into contact with the surface of the fitting earlier and therefore the pressing process and thus the pressure increase in the working cylinder begins earlier, i.e. when the working piston has only moved a few millimeters.
  • D max_DB represents a value stored in the database for the maximum stroke
  • P max_DB represents a value stored in the database for the maximum pressure
  • P max_Press represents a maximum value for a pressure that can be exerted by the pressing machine according to the state of the technology can be carried out. Suitable pressing would already be achieved at corresponding pressures P max_DB1 , P max_DB2 or P max_DB , but the pressing machine in the prior art builds up pressure beyond this value.
  • the pressing process is controlled so that the pressure is only built up to the predetermined value P max_DB .
  • the motor is then stopped and the working piston is moved back to its starting position. The motor can thus be stopped earlier, so that only a reduced maximum pressure P max_DB needs to be applied during the pressing process for complete pressing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Data Mining & Analysis (AREA)
  • Databases & Information Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Presses (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Automatic Assembly (AREA)

Claims (11)

  1. Machine à presser (10), pour la déformation plastique d'une pièce tubulaire,
    en particulier d'un raccord, la machine à presser (10) comprenant :
    des mâchoires de pressage ;
    un entraînement, conçu pour l'entraînement des mâchoires de pressage, afin d'appliquer une force sur la pièce ;
    un système de capteur, lequel est conçu pour acquérir un ensemble de données de pressage pendant un processus de pressage, afin d'identifier automatiquement les mâchoires de pressage et/ou la pièce ; caractérisée par
    une commande (40), qui est conçue pour commander automatiquement l'entraînement de manière adaptée à la pièce et/ou aux mâchoires de pressage pendant le processus de pressage à l'aide de l'ensemble de données de pressage enregistré, afin d'appliquer une force de pressage individuelle,
    un support de stockage avec une base de données (44), laquelle comprend au moins un ensemble de données de pressage stocké pour un processus de pressage d'au moins un type de mâchoires de pressage et/ou d'au moins un type de pièces tubulaires,
    dans laquelle l'au moins un ensemble de données de pressage enregistré représente une première courbe de pressage (K1, K2, K3, K4, K5, K6, K7) et dans laquelle l'au moins un ensemble de données de pressage stocké représente une deuxième courbe de pressage (K1, K2, K3, K4, K5, K6, K7) et dans laquelle les tracés de la première et de la deuxième courbe de pressage (K1, K2, K3, K4, K5, K6, K7) sont contrôlés en vue d'y détecter une concordance et dans laquelle l'entraînement lors d'une concordance de la première et deuxième courbe de pressage (K1, K2, K3, K4, K5, K6, K7) est commandé conformément à l'ensemble de données de pressage stocké.
  2. Machine à presser (10) selon la revendication précédente, dans laquelle la commande (40) est conçue pour comparer l'ensemble de données de pressage enregistré à l'au moins un ensemble de données de pressage stocké et pour commander l'entraînement à l'aide de l'ensemble de données de pressage enregistré, lorsque l'au moins un ensemble de données de pressage enregistré est associé à au moins un ensemble de données de pressage stocké correspondant.
  3. Machine à presser (10) selon l'une des revendications 1 ou 2, dans laquelle la base de données (44) comprend au moins un paramètre de commande spécifique pour commander l'entraînement,
    dans laquelle l'au moins un paramètre de commande spécifique est associé à un ensemble de données de pressage stocké correspondant,
    dans laquelle l'au moins un paramètre de commande spécifique comprend des paramètres de pressage, en particulier une force de pressage maximale, une course de pressage et/ou une durée de pressage et/ou dans laquelle l'au moins un paramètre de commande spécifique comprend des paramètres d'entraînement, en particulier une vitesse d'entraînement, une puissance d'entraînement et/ou une pression d'huile.
  4. Machine à presser (10) selon la revendication précédente, dans laquelle l'entraînement est commandé à l'aide de l'au moins un paramètre de commande spécifique, lorsque l'au moins un ensemble de données de pressage enregistré est associé à au moins un ensemble de données de pressage stocké correspondant.
  5. Machine à presser (10) selon la revendication précédente, dans laquelle l'entraînement est conçu pour être commandé à l'aide de paramètres de commande non spécifiques, lorsque l'au moins un ensemble de données de pressage enregistré n'est pas associé à au moins un ensemble de données de pressage stocké correspondant, dans laquelle l'au moins un paramètre de commande non spécifique comprend des paramètres de pressage, en particulier une force de pressage maximale, une course de pressage et/ou une durée de pressage et/ou dans laquelle l'au moins un paramètre de commande spécifique comprend des paramètres d'entraînement, en particulier une vitesse d'entraînement, une puissance d'entraînement et/ou une pression d'huile.
  6. Machine à presser (10) selon l'une des revendications précédentes, dans laquelle le système de capteur est conçu pour l'identification de caractéristiques, pour des caractéristiques distinctives des mâchoires de pressage et/ou de la pièce, en particulier pour l'identification de caractéristiques distinctives géométriques et/ou spécifiques au matériau à l'aide de l'ensemble de données de pressage enregistré.
  7. Machine à presser (10) selon l'une des revendications précédentes, comprenant en outre une mémoire de protocole, laquelle est conçue pour stocker les données de capteur et/ou données de commande.
  8. Machine à presser (10) selon l'une des revendications précédentes, dans laquelle la machine à presser (10) est un appareil de pressage manuel hydraulique ou mécanique à entraînement électrique.
  9. Procédé pour faire fonctionner une machine à presser (10) selon l'une des revendications 1 à 8 pour la déformation plastique d'une pièce tubulaire, en particulier d'un raccord, le procédé comprenant :
    l'insertion des mâchoires de pressage dans la pièce ; et la production d'une force au moyen des mâchoires de pressage sur la surface de la pièce insérée ;
    l'enregistrement d'un ensemble de données de pressage pendant le processus de pressage, afin d'identifier automatiquement les mâchoires de pressage et/ou la pièce ; caractérisé par
    la commande automatique de l'entraînement, adaptée à la pièce et/ou aux mâchoires de pressage pendant le processus de pressage à l'aide de l'ensemble de données de pressage enregistré, afin d'appliquer une force de pressage individuelle,
    le contrôle des tracés de la première et de la deuxième courbe de pressage en vue d'y détecter une concordance et la commande de l'entraînement lors d'une concordance de la première et deuxième courbe de pressage conformément à l'ensemble de données de pressage stocké.
  10. Procédé selon la revendication précédente, dans lequel une déformation plastique de la pièce pendant le processus de pressage est établie à l'aide de l'ensemble de données de pressage enregistré, et dans lequel la commande comprend un arrêt du moteur (20) lorsqu'il est établi qu'aucune déformation plastique de la pièce n'a plus lieu.
  11. Procédé selon la revendication précédente, dans lequel le procédé comprend en outre le fait que l'entraînement définit une position initiale et une position finale, dans lequel l'entraînement après l'arrêt du moteur (20) est entraîné dans la direction opposée, afin de retourner dans la position initiale.
EP18192953.0A 2018-09-06 2018-09-06 Machine à presser dotée d'un entrainement commandé en fonction des données de pressage enregistrées Active EP3620264B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18192953.0A EP3620264B1 (fr) 2018-09-06 2018-09-06 Machine à presser dotée d'un entrainement commandé en fonction des données de pressage enregistrées
US16/561,718 US11980928B2 (en) 2018-09-06 2019-09-05 Pressing tool with a drive controlled based on recorded pressing data
CN201910841830.XA CN110877080B (zh) 2018-09-06 2019-09-06 具有根据所记录的挤压数据来控制的驱动器的压机

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EP18192953.0A EP3620264B1 (fr) 2018-09-06 2018-09-06 Machine à presser dotée d'un entrainement commandé en fonction des données de pressage enregistrées

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CN111618158A (zh) * 2020-06-09 2020-09-04 成都宏明双新科技股份有限公司 一种防止电子产品加工过程中其上油漆刮伤的工艺
EP4385666A1 (fr) 2022-12-12 2024-06-19 Geberit International AG Dispositif de pressage

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WO2016198973A1 (fr) * 2015-06-09 2016-12-15 Cembre S.P.A Équipement de travail portable pour utilisation en déplacement

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CN110877080B (zh) 2023-06-02
EP3620264A1 (fr) 2020-03-11
CN110877080A (zh) 2020-03-13
US20200078844A1 (en) 2020-03-12
US11980928B2 (en) 2024-05-14

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